Friction draft-gear.



PATENTED JULY 17, 1906.

G. 1. KING. FRICTION DRAFT GEAR.

APPLICATION FILED MAR. 10. 1906.

2 SHEETSSHEBT l.

. ARI/A222 A. W A Allml F No. 826,171. PATENTED JULY 17, 1906. G. I.KING.

FRICTION DRAFT GEAR.

APPLICATION FILED MAB.10.1906.

2 SHEETS-SHEET 2.

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friction draft-gear.

UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented July 17, 1906. I

Application filed March 1O 1906. Serial No. 305,283.

To all whom, it may concern.-

Be it known that I, GEORGE I. KING, a citizen of the United States,residing at Mid dletown', Dauphin county, Pennsylvania, have invented acertain new and useful Improvement in Friction Draft-Gear, of whichthefollowing is afull, clear, and exact description, such as will enableothers skilled in the art to which. it appertains to make and use thesame, reference being had to the accomanying drawings, forming part ofthis specication, in which- Figure 1 is a plan View of my improved Fig.2 is a vertical sectional view of the-same. Fig. 3 is a cross sectionalview of the same; andqFig. 4 is a view similar to Fig. 1, showing amodified form of my invention.

This invention relates to a new and useful improvement in frictiondraft-gear, the ob j ect being to reduce the number of arts and simplifythe construction, so that tie device may be cheaply made, easilyassembled, and readily repaired in the event of breakage ordisarrangement of any of the parts.

In the drawings, 1 indicates the draft-sills of the car-frame, hereshown in the form of channels, and 2 represents the cheek-plates securedto the draft-sills, said cheek-plates having abutments 3 at their endswith which cooperate the follower parts of the draft- 4 is thecoupler-shank, and 5 is the yoke thereof.

6 is a friction-follower in the form of an o en-ended box, the open endbeing presente forwardly, said box being embraced by a yoke affording abearing therefor under pulling strains, between the cheek-plates, theinner side walls thereof being formed tapered and preferably corrugated,as shown, for the purpose of increasing the frictional area thereof.

7 represents longitudinally-movable friction-blocks having outerinclined faces which cooperate with the inclined faces of box 6. Thesefriction-blocks 7 are substantially wedge-shaped, their forward endsunder pulling strains abutting a ainstiorward abutments on the cheek-pates and said blocks under buffing strains being pushed by the rear endof the draw-bar and moved rearwardly along the friction-faces of the box6, as is well understood.

8 is a spring or set of springs interposed between t e blocks 7.

This box is slidingly mounted- The operation of my improved frictiondraft-gear is apparent from the drawings, the 5 box 6 under pullingstrains moving'forward and compressing the spring 8, the blocks 7 movingrearwardly under buffing strains and compressing said springs 8, thefrictionl faces between said moving parts cooperating to cushion shocksor ars and increase the resistance of the movement of the parts, thusenabling the use of lighter sprin s than is possible in a straightspring or tan em draftgear or with equally heavy springs, affording Bylocating the block 7 only partially within the box 6, which is thenormal position of the parts when at rest and in which it will be ingstrains the box 6 is, telescoped over the blocks 7 or the blocks 7 areatelescoped within the box 6, such telescoping action increasingthe'frictional engaging area between the parts, so as to increase'thefrictional resistance as the bufiing and ulling strains are increased.

This increaseo --'-frict1onal resistance is assisted materially bycompression of the springs 8, said springs becoming stiffer as the boaks 7 move in the box 6.

In Fig. 4 I have shown a slightly different form of my invention inwhich a compressionspring 9 and amember 10 are interposed between theend .of the yoke 5 and the rear end of the box 6. 1 This member 10 maybeeither in the form'of an open yoke, as herein shown, or in the form ofa sleeve which surrounds the spring 9. Under pulling strains the spring9 will be first compressed and then the 10 will be moved into engagementwith the friction-follower '6 by the forward of the draw-bar. Under.bufling strains the rearward movement of the draw-bar. will cause thespring 9 to be first compressed and the friction-follower 6 will thencome into engagement with the member 10, which normally en ages the rearabutment 3.

While% have shown the spring 9 arranged back of the friction-gear in themodificatlon shown in Fig. 4-, it will be obvious that said 1 springcould be arranged in front of the friction-gear immediately behind thedraw-bar without departing from the scope of my invention.

Having thus described the invention, what is claimed as new, and desiredto be secured by Letters Patent, is

1. In a friction draftgear, the combination with a friction-follower inthe form of an I greater resistance.

position the springs 8 are expanded,

member obvious that under pulling and buifmovement engaging the ingtherewith and normally arrap be partly within open-ended box, offriction-blocks cooperated so as to said box, a drawar having a portionwith which said friction-blocks contact, and cheek-plates rovidedwithabutments which said bloc s engage when the arts are in normalposition, substantially as described. I t 2. In a friction draft-gear,the combination with a follower provided-with a recess, cheek-platesprovided with abutments of friction-blocks artly within said recess anda utments of the cheek-plates when the partsare in normal position, saidblocks entering said-recess under pulling and buffing strains;substantiallyas described.

3. In a friction draft-gear, the combination with a friction-followerhaving a corrugated tapering walls connected together, of frictionblockscooperating with said walls in such manner that under pulling andbufiing strains the .frictional area of 'icontacti increases as thepulling and buffing strains increase,

a spring interposed between said blocks, and

stationary abutments which said blocks engagewhen the parts are innormal position;

substantially as described.

4. In a friction draft-gear,

\ tion with a friction-follower inthe form of an o en-end'ed-box,friction-blocks cooperating t erewith and normally arranged so as to bepartly within said box, a coup er sh'ank provided with a yoke, and aspring interposed between the closed end of sald yoke and thefriction-follower substantially as described.

5.'In a friction draft-gear, the combination with afollower' provldedwith arecess,

the combina.

of friction-blocks partly within said recess when-the arts are 1n normalposition, a drawbar provi ed with a yoke, a spring interposed 40 betweensaid yoke and follower, and a member ada ted to engage said followerafter said spring as been compressed by the forward movement of thedraw-bar yoke; substantially as described. I

6. In a friction draftear, the combination with rigid follower-autments, of a friction-follower compressing a plurality of blocks whichnormally engage the forward abutments, a cooperating friction-followerrovided with a recess for receivingz-said blocks, a member normallyengaging the rearward follower-abutments, a spring arranged between saidmember and the recessed; 01- lower, and a draw-bar rovided with a yokewithin which said member and said-frictionfollowers' are-located;substantially ass-described.

7. In tion with friction members comprising-'aifo lower in the formof'an o en endedbox, blocks cooperatin -therewit and normally arranged'so asto e partly within said, box, means for actuating saidfriction-members, and a spring arranged between-saidmeans and one ofsaid friction members substantially as described.

In testimon whereof. I hereunto affix: my signature, in t e presence oftwot witnesses, this 5th'day of March, 1906.

GEORGE I. KING. Witnesses:

WM. A. CROLL. A; MARsHALL.

a friction "draft-gear, the: combinsi- V

